python - 在一定时间后调用函数并在按下按钮时终止，tkinter

Question

我制作了一个条目小部件，当单击“确定”时，它会获取输入的数字(这将成为函数重复执行的秒数(n))，我想每n秒调用一次该函数。单击“确定”后，我希望屏幕上显示一个按钮，以阻止该功能重复出现。我怎样才能做到这一点？

这就是我所拥有的:

def ok_func():
    global stop
    stop = 1
    timer_pop.destroy()
    seconds = seconds_entry.get()
    seconds = int(seconds)
    stop_timer.grid()
    while stop == 1:
        stop_timer.config(highlightbackground=mycolor)
        background()
        time.sleep(seconds)

这就是我的停止计时器按钮:

def stopTimer():
    global stop
    stop = 0
    stop_timer.grid_forget()

谢谢编辑:

global counter
counter = 0

def ok_func():
    global stop_timer
    print('function: "ok" is running now.')
    global counter
    counter += 1
    def stopTimer():
        global recur
        stop_timer.destroy()
        timer_pop.after_cancel(recur)
    try:
        if counter == 1:
            global time
            time = int(seconds_entry.get())
            timer_pop.destroy()
            stop_timer = Button(app, text="Stop Timer", command=stopTimer)
            stop_timer.grid(row=0, column=6, padx=10)
            #stop_timer.config(highlightbackground=ok_func)
            global recur
            print ('function will start again in', time, 'seconds')
            recur = app.after(1000*time, background)
        else:
            print ('function will start again in', time, 'seconds')
            recur = app.after(1000*time, background)
            #stop_timer.config(highlightbackground=mycolor)
    except ValueError:
        counter = 0
        print("thats not a number")

你说的我都试过了，还是不行。颜色只改变一次，然后停止。另外，我希望停止计时器按钮可以随背景更改背景，但它不起作用。感谢您的帮助。

Answer 1

这是一个完整的示例，它可以实现您想要的功能(我认为)。

创建了一个重复函数，您可以选择它重复的频率，然后您可以通过按下按钮来终止它(使用after_cancel，这样程序仍然会运行，但不会执行任何操作。)。

from tkinter import *

root = Tk()

global counter
counter = 0

def ok():
    print('function: "ok" is running now.')
    global counter
    counter += 1
    def stop():
        global recur
        label.destroy()
        stop_button.destroy()
        root.after_cancel(recur)
    try:
        if counter == 1:
            global time
            time = int(entry.get())
            label.config(text = 'your only option now is to stop the function')
            entry.destroy()
            ok_button.destroy()
            stop_button = Button(text = 'stop', command = stop)
            stop_button.pack()
            global recur
            print ('function will start again in', time, 'seconds')
            recur = root.after(1000*time, ok)
        else:
            print ('function will start again in', time, 'seconds')
            recur = root.after(1000*time, ok)
    except ValueError:
        counter = 0
        print('thats not a number')

label = Label(root, text = 'pick a number of seconds for the function to recur in')
label.pack()

entry = Entry(root)
entry.pack()

ok_button = Button(root, text = 'Ok', command = ok)
ok_button.pack()

root.title('cool recurring function')
root.mainloop()

希望这就是你想要的，如果没有大喊大叫(并告诉我你想要什么)!